Improvement in valves



o. o. WALWOR'TH;

No. 212,875. Patented Mar. 4, i879.

W HclfEEu-s.

UNITED v STATES PATENT OEEIGE.

CALEB C. WALVVORTH, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN VALVES.

e Specification forming part of Letters Patent No. 212,875, dated March4, 1879; application filed January 13, 1879.

To all whom 'it may concern Be it known that I, OALEE C. WALWORTH, ofBoston, county of Suffolk, and State of Massachusetts, have invented anImprovement in Valves, of which the following description, in connectionwith the accompanying drawings, is a specification.

My invention relates to a valve, and is shown in a valve socoustructedthat the stuffing-box for the stem is done away with.

The valve-stem has a double-faced valve adapted to close upon a sea-t atthe bottom and one at the top ot the valve-ease, as shown in thedrawings, the upper valve-face, when not closed upon the seat,permitting the passage ot' regulated quantities of steam from the valvecase about the stem, and between it and the sleeve or tubular partattached to the valvenut, the said steam entering a hood, which,attached to the stem and rising and falling with it, detlects the steamdownward from the valve-handle, permitting the water of condensation todrop into an evaporating-cup which forms part of the valve-nut.

Figure l represents, in vertical section, a valve embodying myinvention, the valve-stem being in elevation; and Fig. 2 is amodilication thereof.

In this valve the case A and open evaporating-cup B are as in my PatentN 206,373, to which reference may be had.

The valve-case has two seats, a b,to be closed bythe valve-washers c el,they being attached to the valve-head e by means, the rst, of a nut, f,and the second one, d, is placed about a tubular projection, g, at thetop of the head c.

The valve-stem e', provided with a screwthreaded part, h, which enters athreaded part of the valve-nut z', has an enlarged end, le, which,entered into the tubular portioh g of the valve-head, is connectedlooselyr therewith by a union, l, the threads of which enter and engagewith threads at the inner surface of the said projection g.

The valve-nut i has upon its upper side an open evaporating-cup, m, andabove the cup a sleeve, n, the upper end of which, although forming aguide for the valve-stem, has between it and the valve-stem sufficientspace to permit the passage of steam from the valvecase upward betweenthe stem and sleeve, and

thence into the hood o, which, made like an inverted cup or cylinder,issecured to thevalvestem. Steam so passes upward from the case into thehood when the upper valve-face is depressed from contact with its seatb. This is very desirable, specially when the valve is used inconnection with steam-radiators wherein it is desired to meisten theatmosphere in a room or to let out the air from the radiator 0r pipeswhen steam is rst admitted. This hood prevents steam from rising incontact with the handle, and diverts all water of condensation downwardinto the open evaporating-cnp m, from which it is rapidly evaporated bythe heat ofthe-nut. Any overflow from the cup m will be caught by thecup B at the base of the case.

By forming the cup upon the nut of the valve, it is obvious that thisimproved valvestem and nut and attached parts may be readily applied tovalve-s of ordinary construction.

This nut, it will be observed, has upon and forming part of it the uppervalve-seat, b.

It is evident that when the valve is in contact with the upper seat, b,all communication through the valve-nut between the interior of thevalve-case and the outside is cut oft, thereby dispensing with thesmiling-box about the valve-stem, which is necessary in valves ofordinary construction.

The handle p, composed of wood turned to proper shape, and preferablythinner at its center than at its edges, is held at the upper end of thevalve-stem between two strengthching-disks, o" s, the lower one, r,having a square or other than round opening, and having its seat upon ashoulder, t, oi the stem,

the upper disk being held iirmly in position with the handle and lowerdisk upon the stem by means of a nut, a.

The lower disk, o, has about it a flange, w, the inner wall of which, asat 2, has its face inclined toward the center ot' the stem, to thereby,as it is pressed into the wooden handle or into a groove therein, holdthe handle rmly between the disks, holding it with a pressure exertedtoward its center, and lessening the tendency of the handle to be splitor to check.

In the modification, Fig. 2, I have shown the valve-sleeve as providedwith an external thread, upon which is screwed a chambered cap, w, orhood, which, at its upper part, fits the valve-stein. This chamber maybe filled with any fibrous material, asbest-us being preferred, becauseof its great durability. The lower portion of this cap has openings y,to permit steam and water of condensation to pass out into the openevaporating-cup oi' the nut. The fibrous material does not form apacking, but merely serves to prevent the rush of steam toward thehandle.

The devices herein described for attaching the handle to the stem arenot herein claimed, as they will form the subject-matter of anotherapplication.

I claiml. In a valve, a case provided with two independent seats, a b,the working-faces of which face each the other, combined with a sin gievalve-head provided with two faces, to cooperate with the working-facesot the two seats, the combination being as described, to permit the seata to be fully open when the valve-head is at or near seat I),substantially as set forth.

2. In a steam-valve, the valve-case and sleeve or projection in whichthe valve-stem moves loosely, combined with the valve-stem, and hoodwhich embraces the valve-stem, and its guiding-sleeve, the lower portionof the hood being open for the exit of steam from the hood,substantially as described.

3. rllhe combination, with the valve-case, of a removable valve-nutprovided with an external evaporating-cup, substantially as and for thepurpose described.

4. The valve-nut provided with the valveseat, an evaporating-cup, and asleeve to re` ceive the stem of the valve loosely, substantially asdescribed.

5. In a steam-valve, the combination, with the removable valve-nutprovided with an external evaporating-cup, of the valve-case with anevaporatingbup at its base, substantially as and for the purposedescribed.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CALEB C. WALVVORTH.

Witnesses:

G. W. GREGORY, N. E. WHITNEY.

